8results about How to "Wide spectral response range" patented technology

The invention relates to a defect-free ultrathin continuous MOF (Metal Organic Framework) film as well as a preparation method and application thereof. The MOF membrane is synthesized by taking an amidoxime functionalized commercial polyacrylonitrile ultrafiltration membrane as a support body through a diffusion method, and the thickness of the MOF membrane is 22 nm to 1.36 microns. The preparation method comprises the following steps: firstly, respectively preparing aqueous solutions of Fe < 3 + > salt and organic ligands, then respectively placing the aqueous solutions on two sides of a support body, and synthesizing the defect-free ultrathin continuous MOF membrane at room temperature by utilizing a pair diffusion method. Compared with the prior art, the thickness of the defect-free ultrathin continuous MOF membrane is controllable, the minimum thickness can reach 22 nm, the membrane flux and the rejection rate of organic pollutants can be regulated and controlled, the defect-free ultrathin continuous MOF membrane has photocatalytic degradation performance, organic pollutants can be treated through membrane separation and photocatalytic coupling technologies, and the defect-free ultrathin continuous MOF membrane has great application value in the field of wastewater treatment.

The invention relates to the technical field of photocatalysts, in particular to a nonmetal plasmon heterojunction material, a preparation method and application thereof and a method for preparing p-aminophenol through reduction of p-nitrophenol. The nonmetal plasmon heterojunction material provided by the invention comprises a C3N4 nanosheet and a WO3-x nanoplate (x is 0.1 to 0.3) positioned on the surface of the C3N4 nanosheet. The WO3-x local surface plasmon characteristic can effectively expand the spectral response range of the non-metal plasmon heterojunction material in a visible region to a near-infrared region, and the light absorption efficiency of the non-metal plasmon heterojunction material is remarkably enhanced. The nonmetal plasmon heterojunction material provided by the invention can realize efficient reduction of p-nitrophenol based on the synergistic effect of an interface heterojunction, a built-in electric field and oxygen vacancies, is high in selectivity, has excellent photocatalytic activity for reduction of p-nitrophenol, and is excellent in photocatalytic activity stability.

The application discloses a lignin carbon-based halogen bismuth oxide Z-type heterojunction composite material with regular flower-like morphology and a preparation method and application thereof. A lignin carbon-based halogen bismuth oxide Z-type heterojunction composite material BiOX / C with regular flower-like morphology, wide spectral response range, high efficiency and strong stability is synthesized by using lignin carbon with rich oxygen-containing functional groups for induction and pH regulation. Based on the flower-like morphology structure and Z-type heterojunction of the material, the separation of photo-generated carriers and holes is effectively promoted, so that the material has higher photo-reaction efficiency, and the shortcomings of traditional photocatalytic degradation of organic pollutants, such as low quantum efficiency, slow degradation rate, poor stability, easy deactivation and the like, are effectively solved. Moreover, the lignin carbon-based substrate material takes lignocellulose in agricultural waste as a carbon source, is environment-friendly and low in production cost, and has the advantages of simple synthesis method, considerable yield, mild reaction condition in the process of photocatalytic degradation of organic pollutants, simple operation and wide application prospect.

The invention discloses a spider silk loaded sulfide hollow nanotube composite material, belonging to the field of materials, the composite material is a spider silk loaded CdS nanocomposite material with a nanotubular structure obtained by in-situ growing CdS on spider silk; or, a spider silk loaded CdS / NiS nanocomposite material with a nanotubular structure obtained by in-situ growing CdS on spider silk and then loading NiS. The invention is simple to operate, environmentally friendly, can obtain spider silk in-situ loaded CdS or CdS / NiS hollow nanotubes with controllable size, morphology and atomic ratio, improve the dispersibility of CdS or CdS / NiS nanomaterials; change the motion trajectory of photogenerated electron holes, effectively prevent the recombination of photogenerated electrons and holes, and improve the photoelectric efficiency.

The application relates to a kind of cascade low-temperature single-photon detectors based on torsion semimetal materials, comprising: substrate, cascade structure and electrode;Wherein, the cascade structure is arranged on the substrate;The electrode is arranged on the cascade structure;The cascade structure is formed by the alternating stacking of dielectric layer and Dirac semimetal material;The outermost layer of the cascade structure from bottom to top and from top to bottom is the dielectric layer;The electrode includes a top gate electrode arranged at the top of the cascade structure and a plurality of source / drain metal contact electrodes arranged on the Dirac semimetal material.The beneficial effects of the application are: the Fermi level of the Dirac semimetal material used in the application is adjustable, the internal carrier concentration is controlled by the gate region, and the single-photon energy can excite to generate a photovoltage signal.

The invention discloses a photocatalytic heterojunction material for synergistically producing hydrogen and degrading glucose and application of the photocatalytic heterojunction material, and belongs to the technical field of biological medicines. The photocatalytic heterojunction material is a two-dimensional nanosheet and comprises elemental bismuth, oxygen-deficient Bi2WO6 and hydrogen-doped TiO2. The preparation method comprises the following steps: preparing Bi2WO6 from Na2WO4. 2H2O and Bi (NO3) 3.5 H2O through a solvothermal reaction; then carrying out hydrothermal reaction on tetrabutyl titanate and Bi2WO6 to prepare Bi2WO6 / TiO2 (Bi2WO6 / TiO2); and finally, carrying out vacuum calcination on sodium borohydride and Bi2WO6 / TiO2 to obtain the photocatalytic heterojunction. The photocatalytic heterojunction constructed by the invention widens the spectral response range and improves the transfer utilization rate and photon absorption utilization rate of photon-generated carriers, so that the material can produce hydrogen by photolysis of water with glucose as a sacrificial agent in the visible light range, and the functionalized hydrogel material prepared from the material treats DFU by cooperatively adjusting the DFU wound surface microenvironment.

The invention discloses a high-frequency detection array plane based on near-infrared photosensitive core-shell nanowires and a preparation method of the high-frequency detection array plane, and belongs to the technical field of phototransistors. The detection array plane comprises a grid electrode, the upper end of the grid electrode is covered with an insulating layer, a source electrode and a drain electrode are arranged on the two sides of the upper end of the insulating layer respectively, and a core-shell nanowire PIN structure is further arranged at the upper end of the insulating layer and located between the source electrode and the drain electrode; the core-shell nanowire PIN structure comprises an inner layer ZnO nanowire arranged at the upper end of the insulating layer and used as an N-type layer; an intermediate layer PbSe two-dimensional nano fragment is arranged on the upper surface of the inner layer ZnO nanowire and is used as an intrinsic layer; the upper surface of the middle layer PbSe two-dimensional nanometer fragment is covered with an outer layer NiO thin film which is used as a P-type layer. The PIN structure is beneficial to formation of effective carrier separation and transmission at an interface, so that the photoelectric conversion efficiency of the device is improved; niO and ZnO are stable semiconductor materials and have good chemical stability and thermal stability.